Field Validation of the First Recorded Historically Major (Mw >7) Earthquake in China Based on the Age of the Landslide-Dammed Lake

Wenfang Shi, Jinhui Yin, S. Mudd, Wei Xu, Yonggang Zheng
{"title":"Field Validation of the First Recorded Historically Major (Mw >7) Earthquake in China Based on the Age of the Landslide-Dammed Lake","authors":"Wenfang Shi, Jinhui Yin, S. Mudd, Wei Xu, Yonggang Zheng","doi":"10.1785/0220240065","DOIUrl":null,"url":null,"abstract":"\n The first major (Mw>7) earthquake in the Chinese historical catalog is recorded to have occurred near Qishan, in Shaanxi Province, and is entered for the year 780 B.C., but there is limited field evidence of its effects. Previous satellite images and field surveys have shown that there is a cluster of ancient seismic landslides about 50 km long in the northern margin of the Qinling Mountains, south of Qishan, which is the macroepicenter of the 780 B.C. Qishan earthquake. However, the actual age of the landslide group is debated. To constrain this age, we examined a >1 m thick lacustrine deposit above the landslide gravel of a dammed lake impounded by the largest of several landslides near its inferred macroseismic epicenter and determined these were deposited 758–486 B.C. This date is sufficiently close to the catalog age that we infer that this landslide was triggered by the 780 B.C. historical event. This lends credibility to the historical account and resolves earlier speculation based on disputed dates of surface materials on the landslide. We also re-evaluated the magnitude of the 780 B.C. Qishan earthquake and found that it could plausibly be higher than Ms 7.8 (Mw 7.5). The possible seismogenic structure belongs to the Longxian–Qishan–Mazhao fault. This work updated the damage area of the Qishan earthquake and helped us revise the seismic parameters of the historical earthquake.","PeriodicalId":508466,"journal":{"name":"Seismological Research Letters","volume":"23 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Seismological Research Letters","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1785/0220240065","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The first major (Mw>7) earthquake in the Chinese historical catalog is recorded to have occurred near Qishan, in Shaanxi Province, and is entered for the year 780 B.C., but there is limited field evidence of its effects. Previous satellite images and field surveys have shown that there is a cluster of ancient seismic landslides about 50 km long in the northern margin of the Qinling Mountains, south of Qishan, which is the macroepicenter of the 780 B.C. Qishan earthquake. However, the actual age of the landslide group is debated. To constrain this age, we examined a >1 m thick lacustrine deposit above the landslide gravel of a dammed lake impounded by the largest of several landslides near its inferred macroseismic epicenter and determined these were deposited 758–486 B.C. This date is sufficiently close to the catalog age that we infer that this landslide was triggered by the 780 B.C. historical event. This lends credibility to the historical account and resolves earlier speculation based on disputed dates of surface materials on the landslide. We also re-evaluated the magnitude of the 780 B.C. Qishan earthquake and found that it could plausibly be higher than Ms 7.8 (Mw 7.5). The possible seismogenic structure belongs to the Longxian–Qishan–Mazhao fault. This work updated the damage area of the Qishan earthquake and helped us revise the seismic parameters of the historical earthquake.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
基于滑坡堰塞湖年龄的中国历史上首次记录的大地震(Mw>7)的实地验证
据记载,中国历史上第一次大地震(Mw>7)发生在陕西省岐山附近,时间为公元前 780 年,但其影响的实地证据有限。之前的卫星图像和实地调查显示,在岐山以南的秦岭北缘有一个长约 50 公里的古地震滑坡群,这里是公元前 780 年岐山地震的宏观中心。然而,该滑坡群的实际年龄还存在争议。为了确定这一年龄,我们在推断的大地震震中附近的几个滑坡群中最大的一个滑坡所围堰的湖泊中,对滑坡砾石上方厚度大于 1 米的湖积物进行了检查,确定这些滑坡沉积于公元前 758-486 年,这一日期与目录年龄非常接近,因此我们推断这一滑坡是由公元前 780 年的历史事件引发的。这为历史记载提供了可信度,并解决了之前根据滑坡体表面材料有争议的日期所产生的猜测。我们还重新评估了公元前 780 年岐山地震的震级,发现它有可能高于 7.8 级(Mw 7.5)。可能的发震构造属于陇县-岐山-马召断层。这项工作更新了岐山地震的破坏区域,有助于我们修订历史地震的地震参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
A Geodetic-Based Earthquake Early Warning System for Colombia and Ecuador Constraining the Geometry of the Northwest Pacific Slab Using Deep Clustering of Slab Guided Waves An Empirically Constrained Forecasting Strategy for Induced Earthquake Magnitudes Using Extreme Value Theory A Software Tool for Hybrid Earthquake Forecasting in New Zealand DASPy: A Python Toolbox for DAS Seismology
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1